Benzidine

CAS Number

92-87-5

Synonym

Benzidine base; 4,4'-diaminobyphenyl; p-Diaminodiphenyl; CI 37225; Fast cornith base B; p-diamodiphenyl; p,p'-dianiline; di-phenylamine; diphenylamine

Occurrence/Use

Formerly used to test for blood, produce dyes, No longer produced, used, or imported in US, though benzidine-based dyes may be imported.

Cancer Potency Information

Inhalation Unit Risk (μg/cubic meter)-1:	1.4 E-1
Inhalation Slope Factor (mg/kg-day)-1:	5.0 E+2
Oral Slope Factor (mg/kg-day)-1:	5.0 E+2
Comments/References:	OEHHA 2009. Air Toxics Hot Spots Program Technical Support Document for Cancer Potencies. Appendix B. Chemical-specific summaries of the information used to derive unit risk and cancer potency values. Updated 2011. Listed as benzidine.

Air

Proposition 65

Chemical Status

Cancer:	Currently listed

Cancer

Cancer - Listing Mechanism

Labor Code

Listed as causing :	Listed as causing: Cancer
Date of Listing:	02/27/1987

Safe Harbor Levels

No Significant Risk Level (NSRL)

0.001 µg/day

Cancer

Comments

This is the listing and NSRL for Benzidine (and its salts). Benzidine-based dyes listed separately.